Webra 160 XP

Mon Oct 11 06:44:23 AKDT 2004

Chris,

What fuel and %, please?

Richard S.
  ----- Original Message ----- 
  From: Chris Moon 
  To: Amram Privat ; discussion at nsrca.org 
  Sent: Monday, October 11, 2004 8:55 AM
  Subject: Re: Webra 160 XP

  Amram:
      I think the best answer to all of the Webra problems...pump, overheating etc is called the OS140RX.  I cannot say enough good things about this motor.  All season (almost 40 gallons) it has been fuel and fly - no fuss no fiddling no reliability problems. (Ok, I did change 1 bearing)

  Chris
   (my opinion is worth what you pay for it)

  Amram Privat wrote:

Hello Ed.
This is a great help. I am not a Webra Guru at all. In fact, if I go for it
it will be my first expiriance with Webra.
I don't know - I will have to reconsider the Webra. Maybe OS140RX or back to
YS140L
Thanks
Amram

----- Original Message ----- 
From: "Ed Alt" <Ed_Alt at hotmail.com>
To: "Amram Privat" <amram at leshed.com>; <discussion at nsrca.org>
Sent: Monday, October 11, 2004 1:11 PM
Subject: Re: Webra 160 XP

Amram:
The Webra 1.60 seems to do a poor job of transferring heat to the fins and
head.  I learned that the Webra 1.60 really needs attention to ducting
plenty of air to keep the bottom of the engine cool.  I had problems with
the main bearing loosening up and allowing the crankshaft to shift

backwards

enough to cause the prop thrust washer to dig into the crankcase.  This
happened twice on two almost new engines.  I also had problems with the

pump

going flakey, also most likely attributable to excessive heat buildup.

The

other thing is that it is somewhat touchy to adjust.  It runs wonderful

when

everything is just right.  However, you get it right for one temperature,
humidity and field elevation and it completely changes on a different day

or

location.  Some change is expected, but you have to really learn what the
engine wants if you plan to be able to fly it competetively.

Some guys have great luck with the engine.  Locally, one top flyer has

been

getting better results after switching to the VP30 pump with his Webra.

The

best I can say for it as a competition motor is that it is delicate.  I

just

got tired of fussing with the engine all the time, figuring it would be
better to be able to concentrate on flying instead of being a mechanic all
the time.

Unless you are already at Webra guru status or have a local Webra guru to
commiserate with, I would suggest looking into an OS 1.40 RX or OS 1.60 FX
instead.  Since I could not locate a 1.40 at the time, I dropped the OS

1.60

FX  with a VP30 pump in to replace my Webra in mid season and have had no
problems whatsoever.  I quickly got over the fact that it's side exhaust

and

that it is a few ounces heavier.  The wrap around header is no big deal.
You can get one custom made from Karl Mueller or else you can buy a Hatori
header.  The Mueller headers are very nice.  You should plan on replacing
the main bearing with a stainless steel version.  If you stick with the
Webra, there are now SS bearings available for them too.

BTW, the Webra 1.45 that I owned and flew in the same airplane during the
frequent 1.60 downtimes never had a problem with the main bearing shifting
around.  I accumulated about twice as much flight time on the 1.45, but it
had all the other issues that the 1.60 had, i.e., being touchy, having

pump

problems etc.  I hope this helps.

Ed

----- Original Message ----- 
From: "Amram Privat" <amram at leshed.com>
To: <discussion at nsrca.org>
Sent: Monday, October 11, 2004 3:40 AM
Subject: Webra 160 XP

Hello
I am about to order the Onyx140 (Protech) and my plan is to use Webra

160

XP.
Any tips ideas or recommendations as to the Webra 160 XP will be highly
appreciated.
Thanks
Amram Leshed.
http://www.f3a-israel.com

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